CN109491273B - Comprehensive signal control device and control method thereof - Google Patents
Comprehensive signal control device and control method thereof Download PDFInfo
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- CN109491273B CN109491273B CN201811592355.9A CN201811592355A CN109491273B CN 109491273 B CN109491273 B CN 109491273B CN 201811592355 A CN201811592355 A CN 201811592355A CN 109491273 B CN109491273 B CN 109491273B
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Abstract
A comprehensive signal control device and a control method thereof belong to the field of pneumatic control; there is no control device that gives the state of the solenoid valve; the control circuit board is arranged in a shell, is connected with the shell through an installation pillar and is detachably fixed on the installation pillar through an installation fixing piece; the control circuit board comprises a connection port which is respectively connected with a power supply conversion circuit, a control signal receiving circuit and a position feedback signal receiving circuit, and the power supply conversion circuit is respectively connected with the control signal receiving circuit, the position feedback signal receiving circuit, the signal conversion circuit, the control operation circuit and the signal output circuit; the control signal receiving circuit and the position feedback signal receiving circuit are respectively connected with the signal conversion circuit, and the signal conversion circuit is sequentially connected with the control operation circuit and the signal output circuit; the outer surface of the shell is provided with a first wire inlet hole, a second wire inlet hole, a third wire inlet hole, a fourth wire inlet hole and a fifth wire inlet hole; a control device capable of giving the state of a solenoid valve is realized.
Description
Technical Field
The invention belongs to the field of pneumatic control, and particularly relates to a comprehensive signal control device and a control method thereof.
Background
The important role of signal-off hold for pneumatic control systems is well known. When the pneumatic control system works normally, the system is required to provide an air (electric) source and a signal source, and the accurate and continuous provision of the air (electric) source and the signal source is the basic guarantee for the normal work of the pneumatic control system. But in practice the system clearly does not provide one hundred percent assurance. For some technological processes, corresponding protective measures, namely three-break (air source, power supply and signal source break) position-keeping measures of a control system, are required to be adopted to avoid accidents when air break, power break or signal break faults occur. In practice, pneumatic control systems are implemented in a wide variety of ways. For example: an intelligent valve positioner scheme; an electro-pneumatic converter and a pneumatic valve positioner scheme and the like. There is currently no device that gives a control of the state of the solenoid valve.
Disclosure of Invention
The invention overcomes the defects of the prior art and provides a comprehensive signal control device and a control method thereof.A control signal receiving circuit receives a DC4-20mA current source control signal, a position feedback signal receiving circuit receives a feedback signal of an intelligent positioner, and a signal output circuit outputs a control signal and a feedback signal required by a pneumatic control system through the conversion of a signal conversion circuit and the calculation of a control operation circuit, thereby realizing the position holding function and the position feedback function of the pneumatic control system; it is effective to provide a control device capable of giving a state of a solenoid valve.
The technical scheme of the invention is as follows:
a comprehensive signal control device comprises a shell and a control circuit board; the control circuit board is arranged in the shell, is connected with the shell through an installation pillar and is detachably fixed on the installation pillar through an installation fixing piece;
the control circuit board comprises a connecting port, a power supply conversion circuit, a signal conversion circuit, a control signal receiving circuit, a position feedback signal receiving circuit, a control operation circuit and a signal output circuit; the connection port is respectively connected with a power supply conversion circuit, a control signal receiving circuit and a position feedback signal receiving circuit, and the power supply conversion circuit is respectively connected with the control signal receiving circuit, the position feedback signal receiving circuit, the signal conversion circuit, the control operation circuit and the signal output circuit; the control signal receiving circuit and the position feedback signal receiving circuit are respectively connected with a signal conversion circuit, and the signal conversion circuit is sequentially connected with a control operation circuit and a signal output circuit;
the outer surface of the shell is provided with a first wire inlet hole, a second wire inlet hole, a third wire inlet hole, a fourth wire inlet hole and a fifth wire inlet hole;
the connection port of the control circuit board is connected with a signal line for inputting a control signal through the first wire inlet hole; an electromagnetic valve control signal circuit output by the control circuit board is connected with an external electromagnetic valve through the second wire inlet hole, a connecting port of the control circuit board is connected with an external power supply through a third wire inlet hole, an electromagnetic valve state feedback signal circuit output by the control circuit board is fed back to the DCS through a fourth wire inlet hole, and an actuating mechanism state feedback signal output by the control circuit board is fed back to the DCS through a fifth wire inlet hole.
Further, the power conversion circuit comprises a chip U1, a chip U2, a capacitor C7, a polar capacitor C13, a capacitor C8 and a polar capacitor C11; pin 4 of chip U7 connects the one end of electric capacity C7, the negative pole and the terminal G of polarized electric capacity C13 respectively, the other end of electric capacity C7 is connected with the positive pole of polarized electric capacity C13 respectively, power +12V and pin 5 of chip U7, pin 4 of chip U1 connects the one end of electric capacity C8, the negative pole and the ground connection of polarized electric capacity C11 respectively, the other end of electric capacity C8 is connected with the positive pole of polarized electric capacity C11, power +12V and pin 5 of chip U1 respectively.
Further, the control signal receiving circuit comprises a resistor R16, a resistor R15, a resistor R17, a resistor R18, a resistor R19, a resistor R20, a resistor R21, a resistor R22, a potentiometer RV1, a capacitor C14, an amplifier U5A, an amplifier U5B and a diode V1; one end of the resistor R16 is sequentially connected with a resistor R15 and a resistor R17, the other end of the resistor R16 is respectively connected with one end of a resistor R18 and a pin 5 of the amplifier U5B, the other end of the resistor R18 is respectively connected with an end point G, pin 3 of a potentiometer RV1 and one end of a capacitor C14, the other end of the capacitor C14 is connected to pin 2 of the potentiometer RV1 and one end of a resistor R20, pin 1 of the potentiometer RV1 is connected to +12V, the other end of the resistor R20 is connected to pin 3 of an amplifier U5A and one end of a resistor R22, the other end of the resistor R22 is connected to a diode V and pin 1 of the amplifier U5A in sequence, pin 8 of the amplifier U5A is connected to +12V, pin 4 of the amplifier U5A is connected to an end point 4, pin 2 of the amplifier U5A is connected to one end of the resistor R21, the other end of the resistor R21 is connected to pin 7 of the amplifier U5B and one end of the resistor R19, and the other end of the resistor R19 is connected to pin 6 of the amplifier U5A and one end of the resistor R17.
Further, the position feedback signal receiving circuit comprises a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R8, a resistor R9, a resistor R10, a resistor R11, a resistor R12, an amplifier U3A, an amplifier U3B, an amplifier U4A and an amplifier U4B; one end of the resistor R1 is connected with one end of a resistor R3, the other end of the resistor R3 is respectively connected with one end of the resistor R5 and a pin 3 of the amplifier U3A, the other end of the resistor R5 is connected with a ground wire, a pin 8 of the amplifier U3A is connected with a power supply +12V, a pin 1 of the amplifier U3A is respectively connected with one end of the resistor R4 and a pin 5 of the amplifier U3B, the other end of the resistor R4 is respectively connected with a pin 2 of the amplifier U3A and one end of the resistor R2, the other end of the resistor R2 is respectively connected with the other end of the resistor R1 and the ground wire, a pin 4 of the amplifier U3A is connected with the ground wire, and a pin 7 of the amplifier U3B is connected with a pin 6 of the amplifier U3B;
one end of the resistor R5 is connected with one end of the resistor R10, the other end of the resistor R10 is respectively connected with one end of the resistor R12 and a pin 3 of the amplifier U4A, the other end of the resistor R10 is connected with a ground wire, a pin 8 of the amplifier U4A is connected with a power supply +12V, a pin 1 of the amplifier U4A is respectively connected with one end of the resistor R11 and a pin 5 of the amplifier U4B, the other end of the resistor R11 is respectively connected with a pin 2 of the amplifier U4A and one end of the resistor R9, the other end of the resistor R9 is respectively connected with the other end of the resistor R5 and the ground wire, a pin 4 of the amplifier U4A is connected with the ground wire, and a pin 7 of the amplifier U4B is connected with a pin 6 of the amplifier U4B.
Further, the control arithmetic circuit comprises a resistor R25, a resistor R24, a resistor R26, a resistor R23, a resistor R6, a resistor R7, a resistor R13, a resistor R14, a diode V2, a diode V4, a diode V6, a triode V7, a triode V8 and a triode V6; a power supply +12V is respectively connected with one end of a resistor R24 and a resistor R25, the other end of the resistor R24 is respectively connected with one end of a resistor R23 and one end of a resistor R26, the other end of the resistor R26 is connected with a pin 1 of a triode V7, a pin of the triode V7 is respectively connected with an end point G and one end of a light-emitting diode V6, and the other end of the light-emitting diode is connected with the other end of a resistor R23; the diode V2 is connected with one end of the resistor R6, the other end of the resistor R6 is respectively connected with one end of the resistor R7 and a pin 1 of the triode V8, and the other end of the resistor R7 is respectively connected with a ground wire and a pin 3 of the triode V8; the diode V4 is connected with one end of a resistor R13, the other end of the resistor R13 is respectively connected with one end of a resistor R14 and a pin 1 of a triode V9, and the other end of the resistor R14 is respectively connected with a ground wire and a pin 3 of a triode V9.
A control method realized based on the comprehensive signal control device comprises the following steps:
step a, connecting a signal line for inputting a control signal to a connection port of a control circuit board through a first wire inlet hole, connecting a line for connecting an external electromagnetic valve to the connection port of the control circuit board through a second wire inlet hole, connecting an external power supply power line to the connection port of the control circuit board through a third wire inlet hole, connecting a solenoid valve feedback line for connecting a DCS to the connection port of the control circuit board through a fourth wire inlet hole, and connecting an actuating mechanism state feedback signal line for connecting the DCS to the connection port of the control circuit board through a fifth wire inlet hole;
b, the control circuit board monitors an input control signal of DC4-20mA in real time, when the input control signal is lower than a set value, the output control signal changes, namely the electromagnetic valve is powered off, the input control signal is collected through the control signal receiving circuit, comparison operation is carried out through the control operation circuit, and the input control signal is output to the DCS through the signal output circuit;
c, collecting current alarm signals of the ALM1 and the ALM2 head and tail positions of the intelligent valve positioner in real time by a control circuit board, and converting the current alarm signals into relay outputs; when the current alarm signal is lower than a set value, the output of the relay is cut off, the signals of the first and the last positions of the ALM1 and the ALM2 are collected through a position feedback signal receiving circuit, comparison operation is carried out through a control operation circuit, and DCS is output through a signal output circuit;
d, the control circuit board collects the state signals of the actuating mechanism in real time, when the signals are lower than a set value, the output control signals are changed, meanwhile, the output of the relay is given, the state feedback signals of the actuating mechanism are collected through the control signal receiving circuit, comparison operation is carried out through the control operation circuit, and the state feedback signals are output to the DCS through the signal output circuit.
Compared with the prior art, the invention has the following beneficial effects:
the invention provides a comprehensive signal control device and a control method thereof.A control signal receiving circuit receives a DC4-20mA current source control signal, a position feedback signal receiving circuit receives a feedback signal of an intelligent positioner, and a signal output circuit outputs a control signal and a feedback signal required by a pneumatic control system through the conversion of a signal conversion circuit and the calculation of a control operation circuit, thereby realizing the position holding function and the position feedback function of the pneumatic control system; it is effective to provide a control device capable of giving a state of a solenoid valve.
The invention has simple structure, safety and reliability, is convenient for field installation, and can better meet the requirements of various severe environments on the field;
the invention can meet the requirements of signal interruption and signal feedback of various pneumatic control systems, and has the advantages of simple structure, convenient installation and debugging and equipment operation indication.
Drawings
FIG. 1 is a view showing the external structure of the apparatus of the present invention;
FIG. 2 is a view showing the internal structure of the apparatus of the present invention;
FIG. 3 is a block diagram of the control circuit board of the present invention;
FIG. 4 is a power conversion circuit diagram of the present invention;
FIG. 5 is a circuit diagram of a control signal receiving circuit of the present invention;
FIG. 6 is a circuit diagram of a position feedback signal receiving circuit of the present invention;
fig. 7 is a control arithmetic circuit and signal output circuit diagram of the present invention.
In the figure: the novel solar battery comprises a shell 1, a control circuit 2, an installation supporting column 3, an installation fixing piece 4, a first wire inlet hole 6, a second wire inlet hole 7, a third wire inlet hole 7, a fourth wire inlet hole 8 and a fifth wire inlet hole 9.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings.
Detailed description of the invention
An integrated signal control device, as shown in fig. 1 and 2, includes a housing 1 and a control circuit board 2; the control circuit board 2 is arranged in the shell 1, the control circuit board 2 is connected with the shell 1 through a mounting support 3, and is detachably fixed on the mounting support 3 through a mounting fixing piece 4;
as shown in fig. 3, the control circuit board 2 includes a connection port, a power conversion circuit, a signal conversion circuit, a control signal receiving circuit, a position feedback signal receiving circuit, a control arithmetic circuit, and a signal output circuit; the connection port is respectively connected with a power supply conversion circuit, a control signal receiving circuit and a position feedback signal receiving circuit, and the power supply conversion circuit is respectively connected with the control signal receiving circuit, the position feedback signal receiving circuit, the signal conversion circuit, the control operation circuit and the signal output circuit; the control signal receiving circuit and the position feedback signal receiving circuit are respectively connected with a signal conversion circuit, and the signal conversion circuit is sequentially connected with a control operation circuit and a signal output circuit;
a first wire inlet hole 5, a second wire inlet hole 6, a third wire inlet hole 7, a fourth wire inlet hole 8 and a fifth wire inlet hole 9 are formed in the outer surface of the shell 1;
the connection port of the control circuit board 2 is connected with a signal line for inputting a control signal through the first wire inlet hole 5; the electromagnetic valve control signal circuit output by the control circuit board 2 is connected with an external electromagnetic valve through the second wire inlet 6, the connection port of the control circuit board 2 is connected with an external power supply through the third wire inlet 7, the electromagnetic valve state feedback signal circuit output by the control circuit board 2 is fed back to the DCS through the fourth wire inlet 8, and the actuating mechanism state feedback signal output by the control circuit board 2 is fed back to the DCS through the fifth wire inlet 9.
The working principle is as follows: the control signal receiving circuit receives a DC4-20mA current source control signal, the position feedback signal receiving circuit receives a feedback signal of the intelligent positioner, and the signal output circuit outputs a control signal and a feedback signal required by the pneumatic control system through the conversion of the signal conversion circuit and the judgment of the control operation circuit, so that the position keeping function and the position feedback function of the pneumatic control system are realized.
Detailed description of the invention
Further, as shown in fig. 4, the power conversion circuit includes a chip U1, a chip U2, a capacitor C7, a polar capacitor C13, a capacitor C8, and a polar capacitor C11; u1 is an AC-DC power supply module, model: HAS 5-24-N. U7 is an AC-DC power supply module, model: HAS 2.5-12-N. Pin 1 of U7 and pin 1 of U1 are both empty pins. G is a network label, and all G points are connected; pin 4 of chip U7 connects the one end of electric capacity C7, the negative pole and the terminal G of polarized electric capacity C13 respectively, the other end of electric capacity C7 is connected with the positive pole of polarized electric capacity C13 respectively, power +12V and pin 5 of chip U7, pin 4 of chip U1 connects the one end of electric capacity C8, the negative pole and the ground connection of polarized electric capacity C11 respectively, the other end of electric capacity C8 is connected with the positive pole of polarized electric capacity C11, power +12V and pin 5 of chip U1 respectively.
Further, as shown in fig. 5, the control signal receiving circuit includes a resistor R16, a resistor R15, a resistor R17, a resistor R18, a resistor R19, a resistor R20, a resistor R21, a resistor R22, a potentiometer RV1, a capacitor C14, an amplifier U5A, an amplifier U5B, and a diode V1; one end of the resistor R16 is sequentially connected with a resistor R15 and a resistor R17, the other end of the resistor R16 is respectively connected with one end of a resistor R18 and a pin 5 of an amplifier U5B, the other end of the resistor R18 is respectively connected with an end point G, a pin 3 of a potentiometer RV1 and one end of a capacitor C14, the other end of the capacitor C14 is respectively connected with a pin 2 of the potentiometer RV1 and one end of a resistor R20, a pin 1 of the potentiometer RV1 is connected with a power supply +12V, the other end of the resistor R20 is respectively connected with a pin 3 of the amplifier U5A and one end of a resistor R22, and the other end of the resistor R22 is sequentially connected with a diode V1, the terminal A and the pin 1 of the amplifier U5A, the pin 8 of the amplifier U5A is connected with the power supply +12V, the pin 4 of the amplifier U5A is connected with the terminal 4, the pin 2 of the amplifier U5A is connected with one end of the resistor R21, the other end of the resistor R21 is respectively connected with the pin 7 of the amplifier U5B and one end of the resistor R19, and the other end of the resistor R19 is respectively connected with the pin 6 of the amplifier U5A and the resistor R17.
Further, as shown in fig. 6, the position feedback signal receiving circuit includes a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R8, a resistor R9, a resistor R10, a resistor R11, a resistor R12, an amplifier U3A, an amplifier U3B, an amplifier U4A, and an amplifier U4B; one end of the resistor R1 is connected with one end of a network label 6 and one end of a resistor R3 respectively, the other end of the resistor R3 is connected with one end of the resistor R5 and a pin 3 of the amplifier U3A respectively, the other end of the resistor R5 is connected with a ground wire, a pin 8 of the amplifier U3A is connected with a power supply +12V, a pin 1 of the amplifier U3A is connected with one end of the resistor R4 and a pin 5 of the amplifier U3B respectively, the other end of the resistor R4 is connected with a pin 2 of the amplifier U3A and one end of the resistor R2 respectively, the other end of the resistor R2 is connected with the other end of the resistor R1 and the ground wire respectively, a pin 4 of the amplifier U3A is connected with the ground wire, and a pin 7 of the amplifier U3B is connected with a pin 6 of the amplifier U3B;
one end of the resistor R5 is connected with one end of a network label 8 and one end of a resistor R10 respectively, the other end of the resistor R10 is connected with one end of the resistor R12 and a pin 3 of the amplifier U4A respectively, the other end of the resistor R10 is connected with a ground wire, a pin 8 of the amplifier U4A is connected with a power supply +12V, a pin 1 of the amplifier U4A is connected with one end of the resistor R11 and a pin 5 of the amplifier U4B respectively, the other end of the resistor R11 is connected with a pin 2 of the amplifier U4A and one end of the resistor R9 respectively, the other end of the resistor R9 is connected with the other end of the resistor R5 and the ground wire respectively, a pin 4 of the amplifier U4A is connected with the ground wire, and a pin 7 of the amplifier U4B is connected with a pin 6 of the amplifier U4B.
Further, as shown in fig. 7, the control arithmetic circuit includes a resistor R25, a resistor R24, a resistor R26, a resistor R23, a resistor R6, a resistor R7, a resistor R13, a resistor R14, a diode V2, a diode V4, a diode V6, a transistor V7, a transistor V8, and a transistor V6; a power supply +12V is respectively connected with one end of a resistor R24 and a resistor R25, the other end of the resistor R24 is respectively connected with one end of a resistor R23 and one end of a resistor R26, the other end of the resistor R26 is connected with a pin 1 of a triode V7, a pin of the triode V7 is respectively connected with an end point G and one end of a light-emitting diode V6, and the other end of the light-emitting diode is connected with the other end of a resistor R23; one end of a diode V2 is connected with one end of a resistor R6, the other end of the resistor R6 is respectively connected with one end of a resistor R7 and a pin 1 of a triode V8, and the other end of the resistor R7 is respectively connected with a ground wire and a pin 3 of a triode V8; one end of diode V4 connecting resistance R13's one end, the other end of resistance R13 is connected resistance R14's one end and triode V9's pin 1 respectively, the other end of resistance R14 is connected ground wire and triode V9's pin 3 respectively, endpoint A is connected to between resistance R24, resistance R23 and the resistance R26, and the other end of diode V2 is connected pin 6 and pin 7 of amplifier U3B respectively, and the other end of diode V4 is connected amplifier U4B's pin 6 and pin 7 respectively, all amplifier models are LM 358.
Further, the connection port comprises a connection terminal X1 and a connection terminal X2, and as shown in fig. 7, the signal output circuit comprises a capacitor C5, a capacitor C6, a fuse F1, a resistor R27, a resistor R28, a capacitor C10, a chip U6, a chip U8, a relay KP1, a relay KP2, a diode V3 and a diode V5; the chip U6 and the chip U8 are both solid-state relays and are used for triggering and isolating. Pin 1 of the connection terminal X1 is connected to one end of a resistor R28, one end of a resistor R27 and pin 4 of a chip U6, the other end of the resistor R27 is connected to one end of a capacitor C10, the other end of the capacitor C10 is connected to pin 3 of a chip U6, the other end of the resistor R28 and one end of a fuse F1, the other end of the fuse F1 is connected to pin 3 of the connection terminal X1, pin 1 of the chip U6 is connected to the resistor R6, pin 2 of the chip U6 is connected to pin 3 of the chip U6, pin 4 of the chip U6 is connected to pin 3 of a triode V6, pin 1 of the chip U6 is connected to +12V, pin 2 of the chip U6 is connected to pin 5 of a relay KP 6, one end of the diode V6, pin 5 of the relay V6 and one end of the diode V6, pin 3 of the relay KP 6 and one end of the diode V6 are connected to pin 362 of the relay KP 6, pin 1, pin 2 and pin 4 of the relay KP1 and pin 5, pin 7 and pin 6 of a connection terminal X1, pin 1, pin 2 and pin 4 of the relay KP2 and pin 8, pin 10 and pin 9 of a connection terminal X1, pin 13 of a connection terminal X1 is connected with one end of a capacitor C6, the other end of the capacitor C6 is connected with a terminal G and a capacitor C5, respectively, pin 5 of a connection terminal X2 and pin 7 of a connection terminal X2 are connected with a power supply +12V, pin 3 of a connection terminal X1 is also connected with pin 3 of U7 and pin 3 of U1, respectively, pin 4 of a connection terminal X1 is connected with pin 2 of a connection terminal X1, pin 2 of U7 and pin 2 of U1, pin 1 of U1 is connected with pin 1 of U2, pin 13 of a connection terminal X1 is also connected between a resistor R16 and a resistor R15, pin 15 of X2 is also connected between a resistor R17 and a resistor 59692, the pin 6 and the pin 8 of the connection terminal X2 are connected to the network label 6 and the network label 8, respectively.
Detailed description of the invention
A control method realized based on the comprehensive signal control device comprises the following steps:
step a, connecting a signal line for inputting a control signal to a connection port of a control circuit board 2 through a first wire inlet 5, connecting a line for connecting an external electromagnetic valve to the connection port of the control circuit board 2 through a second wire inlet 6, connecting an external power supply power line to the connection port of the control circuit board 2 through a third wire inlet 7, connecting an electromagnetic valve feedback line for connecting a DCS to the connection port of the control circuit board 2 through a fourth wire inlet 8, and connecting an actuating mechanism state feedback signal line for connecting the DCS to the connection port of the control circuit board 2 through a fifth wire inlet 9;
b, the control circuit board 2 monitors input control signals of DC4-20mA in real time, when the input control signals are lower than a set value, the output control signals are changed, namely the electromagnetic valve is powered off, the input control signals are collected through a control signal receiving circuit, comparison operation is carried out through a control operation circuit, and the input control signals are output to a DCS through a signal output circuit, wherein the DCS is a user;
c, the control circuit board 2 collects current alarm signals of the ALM1 and ALM2 head and tail positions of the intelligent valve positioner in real time and converts the current alarm signals into relay output; when the current alarm signal is lower than a set value, the output of the relay is cut off, the signals of the first and the last positions of the ALM1 and the ALM2 are collected through a position feedback signal receiving circuit, comparison operation is carried out through a control operation circuit, and DCS is output through a signal output circuit;
and d, the control circuit board 2 collects the state signals of the actuating mechanism in real time, when the signals are lower than a set value, the output control signals are changed, the output of a relay is given, the state feedback signals of the actuating mechanism are collected through a control signal receiving circuit, comparison operation is carried out through a control operation circuit, and the state feedback signals are output to the DCS through a signal output circuit.
Claims (5)
1. The comprehensive signal control device is characterized by comprising a shell (1) and a control circuit board (2); the control circuit board (2) is arranged in the shell (1), the control circuit board (2) is connected with the shell (1) through an installation pillar (3), and is detachably fixed on the installation pillar (3) through an installation fixing piece (4);
the control circuit board (2) comprises a connecting port, a power supply conversion circuit, a signal conversion circuit, a control signal receiving circuit, a position feedback signal receiving circuit, a control operation circuit and a signal output circuit; the connection port is respectively connected with a power supply conversion circuit, a control signal receiving circuit and a position feedback signal receiving circuit, and the power supply conversion circuit is respectively connected with the control signal receiving circuit, the position feedback signal receiving circuit, the signal conversion circuit, the control operation circuit and the signal output circuit; the control signal receiving circuit and the position feedback signal receiving circuit are respectively connected with a signal conversion circuit, and the signal conversion circuit is sequentially connected with a control operation circuit and a signal output circuit;
a first wire inlet hole (5), a second wire inlet hole (6), a third wire inlet hole (7), a fourth wire inlet hole (8) and a fifth wire inlet hole (9) are formed in the outer surface of the shell (1);
the connection port of the control circuit board (2) is connected with a signal line for inputting a control signal through the first wire inlet hole (5); an electromagnetic valve control signal circuit output by the control circuit board (2) is connected with an external electromagnetic valve through the second wire inlet hole (6), a connecting port of the control circuit board (2) is connected with an external power supply through a third wire inlet hole (7), an electromagnetic valve state feedback signal circuit output by the control circuit board (2) is fed back to the DCS through a fourth wire inlet hole (8), and an actuating mechanism state feedback signal output by the control circuit board (2) is fed back to the DCS through a fifth wire inlet hole (9);
connecting a signal line for inputting a control signal to a connection port of a control circuit board (2) through a first wire inlet hole (5), connecting a line for connecting an external electromagnetic valve to the connection port of the control circuit board (2) through a second wire inlet hole (6), connecting an external power supply power line to the connection port of the control circuit board (2) through a third wire inlet hole (7), connecting an electromagnetic valve feedback line for connecting a DCS to the connection port of the control circuit board (2) through a fourth wire inlet hole (8), and connecting an actuating mechanism state feedback signal line for connecting the DCS to the connection port of the control circuit board (2) through a fifth wire inlet hole (9);
the control circuit board (2) monitors an input control signal of DC4-20mA in real time, when the input control signal is lower than a set value, the output control signal changes, namely the electromagnetic valve is powered off, the input control signal is collected through the control signal receiving circuit, comparison operation is carried out through the control operation circuit, and the input control signal is output to the DCS through the signal output circuit;
the control circuit board (2) collects current alarm signals of the ALM1 and ALM2 head and tail positions of the intelligent valve positioner in real time and converts the current alarm signals into relay output; when the current alarm signal is lower than a set value, the output of the relay is cut off, the signals of the first and the last positions of the ALM1 and the ALM2 are collected through the position feedback signal receiving module circuit, the comparison operation is carried out through the control operation module circuit, and the DCS is output through the signal output module circuit;
the control circuit board (2) collects the state signals of the actuating mechanism in real time, when the signals are lower than a set value, the output control signals are changed, the output of the relay is given, the state feedback signals of the actuating mechanism are collected through the control signal receiving circuit, comparison operation is carried out through the control operation circuit, and the state feedback signals are output to the DCS through the signal output circuit.
2. The integrated signal control device of claim 1, wherein the power conversion circuit comprises a chip U1, a chip U2, a capacitor C7, a polar capacitor C13, a capacitor C8 and a polar capacitor C11; pin 4 of chip U7 connects the one end of electric capacity C7, the negative pole and the terminal G of polarized electric capacity C13 respectively, the other end of electric capacity C7 is connected with the positive pole of polarized electric capacity C13 respectively, power +12V and pin 5 of chip U7, pin 4 of chip U1 connects the one end of electric capacity C8, the negative pole and the ground connection of polarized electric capacity C11 respectively, the other end of electric capacity C8 is connected with the positive pole of polarized electric capacity C11, power +12V and pin 5 of chip U1 respectively.
3. The integrated signal control device of claim 1, wherein the control signal receiving circuit comprises a resistor R16, a resistor R15, a resistor R17, a resistor R18, a resistor R19, a resistor R20, a resistor R21, a resistor R22, a potentiometer RV1, a capacitor C14, an amplifier U5A, an amplifier U5B and a diode V1; one end of the resistor R16 is sequentially connected with a resistor R15 and a resistor R17, the other end of the resistor R16 is respectively connected with one end of a resistor R18 and a pin 5 of the amplifier U5B, the other end of the resistor R18 is respectively connected with an end point G, pin 3 of a potentiometer RV1 and one end of a capacitor C14, the other end of the capacitor C14 is connected to pin 2 of the potentiometer RV1 and one end of a resistor R20, pin 1 of the potentiometer RV1 is connected to +12V, the other end of the resistor R20 is connected to pin 3 of an amplifier U5A and one end of a resistor R22, the other end of the resistor R22 is connected to a diode V and pin 1 of the amplifier U5A in sequence, pin 8 of the amplifier U5A is connected to +12V, pin 4 of the amplifier U5A is connected to an end point 4, pin 2 of the amplifier U5A is connected to one end of the resistor R21, the other end of the resistor R21 is connected to pin 7 of the amplifier U5B and one end of the resistor R19, and the other end of the resistor R19 is connected to pin 6 of the amplifier U5A and one end of the resistor R17.
4. The integrated signal control device of claim 1, wherein the position feedback signal receiving circuit comprises a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R8, a resistor R9, a resistor R10, a resistor R11, a resistor R12, an amplifier U3A, an amplifier U3B, an amplifier U4A and an amplifier U4B; one end of the resistor R1 is connected with one end of a resistor R3, the other end of the resistor R3 is respectively connected with one end of the resistor R5 and a pin 3 of the amplifier U3A, the other end of the resistor R5 is connected with a ground wire, a pin 8 of the amplifier U3A is connected with a power supply +12V, a pin 1 of the amplifier U3A is respectively connected with one end of the resistor R4 and a pin 5 of the amplifier U3B, the other end of the resistor R4 is respectively connected with a pin 2 of the amplifier U3A and one end of the resistor R2, the other end of the resistor R2 is respectively connected with the other end of the resistor R1 and the ground wire, a pin 4 of the amplifier U3A is connected with the ground wire, and a pin 7 of the amplifier U3B is connected with a pin 6 of the amplifier U3B;
one end of the resistor R5 is connected with one end of the resistor R10, the other end of the resistor R10 is respectively connected with one end of the resistor R12 and a pin 3 of the amplifier U4A, the other end of the resistor R10 is connected with a ground wire, a pin 8 of the amplifier U4A is connected with a power supply +12V, a pin 1 of the amplifier U4A is respectively connected with one end of the resistor R11 and a pin 5 of the amplifier U4B, the other end of the resistor R11 is respectively connected with a pin 2 of the amplifier U4A and one end of the resistor R9, the other end of the resistor R9 is respectively connected with the other end of the resistor R5 and the ground wire, a pin 4 of the amplifier U4A is connected with the ground wire, and a pin 7 of the amplifier U4B is connected with a pin 6 of the amplifier U4B.
5. The integrated signal control device according to claim 1, wherein the control arithmetic circuit comprises a resistor R25, a resistor R24, a resistor R26, a resistor R23, a resistor R6, a resistor R7, a resistor R13, a resistor R14, a diode V2, a diode V4, a diode V6, a transistor V7, a transistor V8 and a transistor V6; a power supply +12V is respectively connected with one end of a resistor R24 and a resistor R25, the other end of the resistor R24 is respectively connected with one end of a resistor R23 and one end of a resistor R26, the other end of the resistor R26 is connected with a pin 1 of a triode V7, a pin of the triode V7 is respectively connected with an end point G and one end of a light-emitting diode V6, and the other end of the light-emitting diode is connected with the other end of a resistor R23; the diode V2 is connected with one end of the resistor R6, the other end of the resistor R6 is respectively connected with one end of the resistor R7 and a pin 1 of the triode V8, and the other end of the resistor R7 is respectively connected with a ground wire and a pin 3 of the triode V8; the diode V4 is connected with one end of a resistor R13, the other end of the resistor R13 is respectively connected with one end of a resistor R14 and a pin 1 of a triode V9, and the other end of the resistor R14 is respectively connected with a ground wire and a pin 3 of a triode V9.
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